science-ation/db/db.update.117.php

<?
function db_update_117_post()
{
	global $config, $pdo;

	$qmap = array('years_school' => 'Years School',
		'years_regional' => 'Years Regional',
		'years_national' => 'Years National',
		'willing_chair' => 'Willing Chair');

	foreach ($qmap as $field => $head) {
		$q = $pdo->prepare("SELECT id FROM questions WHERE db_heading=?");
		$q->execute([$head]);
		while ($i = $q->fetch(PDO::FETCH_OBJ)) {
			$id = $i->id;

			/* Drop all answers for this question */
			$stmt = $pdo->prepare("DELETE FROM question_answers
					WHERE questions_id=?");
			$stmt->execute([$id]);
		}

		/* Now dump the question itself */
		$stmt = $pdo->prepare("DELETE FROM questions 
				WHERE id=?");
		$stmt->execute([$id]);
	}
}